Thank you guys. It's very reassuring to read your advice and stories. He was 9.8 this morning, had toast and a banana and is now 13.3. I assume that's the toast??? He is on fixed amounts of insulin at the moment and been told to eat what he likes basically. But I know he should limit carbs. I will make ham salad for lunch as that's no carbs. I have no idea if this is correct. But we have an appointment on tuesday with the diabetes team. In sure they will go over his numbers then and hopefully clarify some things!
He doesn't necessarily have to limit carbs. We all choose to eat varying amounts of carbs here. He will gradually find a good level for him. Excessive amounts of carbs are a bad idea for Type 1s but people here choose to eat low carb, moderate carb or whatever suits them. (Type 2 is slightly different).